Shaft-bending machine.



PATENTED MAY 5, 1908.

P. P. DYKE. SHAFT BENDING MACHINE.

APPLICATION FILED JULY 27, 1907.

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PASCHAL P. DYKE, OF SIDNEY, OHIO.

SHAFT-BENDING MACHINE.

Specification of Letters Patent.

Patented May 5, 1908.

Application filed July 27, 1907. Serial No. 385.909.

T 0 all whom it may concern:

Be it known that I, PASCHAL P. DYKE, a citizen of the United States,residing at Sidney, in the county of Shelby and State of Ohio, haveinvented certain new and useful Improvements in Shaft-Bending Machines,of which the following is a specification.

My invention relates to improvements in shaft bending machines, and hasespecial reference to the construction of the clamp devices which areapplied to the outer portions of the shafts in order to cause the sameto contact closely wit-h the former or formers employed for giving theshaft the proper curvature in different portions of its length.

I contemplate the rovision of'a clamping construction pivotal y mounted,its ivot being preferably arranged so that the c amp may be set at agreater or less distance from the outer face of the shaft, said clampextending practically from one end of said shaft'to the other, and beingapplied throughout the length thereof to give the same the propercurvature as determined by the shape of the former or formers applied tothe inner face of the shaft. lVith these and other advantages in mind Iprovide a construction one embodiment of which is shown in the drawingsin which Figure 1 is a plan view of my improved clamping devices inplace, two shafts being formed simultaneously; Fig. 2 is a sideelevation of a bending machine and shaft having my improved clampapplied thereto.

Referring to the drawings, in which the same numerals indicate identicalparts throughout, 1 is the framework of the bending machine havingthereon the table 2 upon which the forming devices are arranged.

3 designates the former for the rear portion of the shafts, and is seento have convex sides 4; this is located appropriately upon the table 2.A device for bending the rear end portion of the shaft is shown at theconvex former 5, the strap 6 engaging the convex face of the shaft end7, the said shaft end being bent upwardly through the mechanism showngenerally at 8, 9 and 10. This forms no feature of my invention and neednot be further described. When the end 7 of the shaft has assumed theproper degree of curvature, the hook rod 11, secured to the end formerat 12, is secured to the catch 13, whereby the shaft is held in its bentposition.

The shafts are shown at 14 and 15, it being preferable to bend twoshafts at the same time, inasmuch as only one former 3 is necessary forthat purpose. Between the outer ends 16 and 17 of the shafts isinterposed a tip-former 18, which is adapted to be pushed inwardly bythe head block 19 on the screw 20, turned by the lever 21. Thetip-former 18, as it is pushed inwardly, engages a strap 22, secured atits ends to the arms 23, hinged at 24, to the bent arms 25, the latterengaging the end of the shaft and the end of the tip-clamp 26, which isproperly curved on its inner face and positioned against the outer faceof the shaft. At their opposite ends, the tip-clamps 26 are reduced andare secured upon the shafts by the clasp member 27.

The inner ends of the shafts being positioned as shown, the tip-clampsare positioned, the bent arms 25 are placed thereon to engage the endsof said tip-clamps and the shaft proper, the strap 22 therefore lyingbetween the shaft ends; the tip-former 18 is then positioned and poweris applied thereto through the lever 21, screw 20, and head 19,

and the said tip-former is forced inwardly against the strap 22, therebysetting up a stress in the molecules of the shafts, compressing thesame, so that the wood may be able to endure the bending stress appliedthrough the clamps now about to be described.

The foregoing operation having been per formed, the side clamp members28 and 29 are next applied to the outer faces of the shafts. Theseclamps are pivoted at 30, and 31, the pivot openings therethrough beingpreferably enlarged. In these pivot openings are positioned eccentricmembers 82 and 33 hearing the lugs 34 and 35, by which said eccentricmembers may be rotated. In this manner, the clamps are seated nearer toor farther away from the adjacent portions of the shafts, as desired.The said clamps contain the extensions 36 and 37, which engage the shaftat appropriate points, it being understood that these extensions aloneengage with the outer face of the shaft, the clamp standing away fromthe body of the shaft throughout the greater portion of its length. Theclamp further has the smooth faced portion 38 adapted to contact withthe tipclamp 26 to force the latter into engagement with the shaft end,thereby imparting to the said end the proper form or degree ofcurvature. The clamps 28 and 29 are formed in the same manner each toengage a shaft, and

being pivoted at points 30 and 31it is necessaid shaft is given itslateral curvature at one sary, in order to bring said clamps into properengagement with said shafts, only to apply pressure to the forwardportions of the clamps, and this is appropriately applied in thevicinity of the smooth faced portion 38, already described. upon thesaid clamps 28 and 29 is provided by means of the swinging arms 39 and40 bearing at their engaging ends the anti-frictional rollers 41 and 42a description of the manner of operating one of these arms willsu'flice. The arm 40 is positioned upon the upper squared end 43 of theshaft 44, the latter being rotated in a well understood manner throughthe bevel gearing 45. It is readily seen that the arm 40 may be swunginto or out of contact with the clamp member 28, and that the length ofthe arm 40 will determine the degree of inward movement that may beimparted to the end 38 of the said clamp member, thereby alsodetermining the pressure to be applied to the shaft throughout itslength.

The shaft and former and clamp members are secured in proper positionupon the table 2 by means of the tie-rod 46, engaging in a ring 47 atone end, and being adapted to engage with the fixed hook 48 at its otherend; in this manner any tendency of the parts to rise from theirhorizontal position under pressure is averted.

Details of the construction showing the manner of operating are outlinedconventionally in the drawings, but inasmuch as they relate to theoperation of the machine in parts which are not new and which form nofeature of this invention, they are not herein specifically described,the intention being only to describe enough of the mechanism to makeclear the manner of operation of my improved clamping devices. The ideaof providing formers to lie between two shafts and of applying power tothe outer faces of the said shafts to compel them to conform in outlineto the former, is not new, and is not claimed herein. It is seen,therefore, that the novelty herein claimed resides in the provision ofone side clamping member for each shaft and the devices for bringingthis into contact with the shaft at appropriate points.

Having thus described my invention, what I claim is:

1. In a shaft bending machine having a former thereon for the body ofthe shaft, a tip former and a tip clamp, a clamp member pivotallymounted adjacent the inner end of said shaft and adapted to be swung onits pivot to engage said shaft practically throughout the lengththereof, and also to engage said tip clamp, a swinging arm for forcingsaid clamp memberinwardly on its pivot to engage said tip clamp and saidshaft, whereby The inward pressure.

operation.

2. In a shaft bending machine having a former for the body of saidshaft, a tipformer and a tip-clamp, a clamp member I pivotally mountedadjacent the inner end of said shaft and extending to a oint adjacentthe outer end of said shaft, an means for applying pressure to the freeend of said clamp member to force the same into engagement with saidtip-clamp and said shaft body practically throughout the length of thelatter,

whereby said shaft is given its lateral curvature at one operation, andadjustable means for positioning said shaft upon its pivot.

3. In. a shaft bending machine having a former for the body of saidshaft, a tipformer and a tip-clamp, a clamp member pivotally mountedadjacent the inner end of said shaft and extending to a oint adjacentthe outer end of said shaft, an means for applying pressure to the freeend of said clamp member to force the same into engagement with saidtip-clamp and said shaft body practically throughout the length of thelatter, whereby said shaft is given its lateral curvature at oneoperation, and eccentric means mounted upon said pivot for positioningsaid clamp member with respect to said shaft.

4. In a shaft bending machine havin appropriate body and tip-formers, a0 amp member ivotally mounted adjacent one end thereof 'or forcing saidshaft into engagement with said formers and extending practicallythroughout the length of said shaft, projections on said clamp memberfor engaging said shaft, eccentric means for positioning said clampmember upon its pivot relative to said shaft, and means adapted to beapplied to said clamp member adjacent its free end for forcing saidmember into engagementwith said shaft at points distributed practicallythroughout its length, whereby said shaft is given its lateral curvatureat one operation.

-5. In a shaft bending machine havin appropriate body and tip formers, acIamp member pivotally mounted adjacent one end thereof for forcing saidshaft into engagement with said. formers and extending practicallythroughout the length of said shaft, projections on said clamp memberfor engaging said shaft, and means adapted to be applied to said clampmember adjacent its free end for forcing said member into engagementwith said shaft at points distributed practically throughout its length,whereby said shaft is given its lateral curvature at one operation.

In testimony whereof I affix my signature in the presence of twowitnesses.

PASCHAL P. DYKE. Witnesses:

ANDREW J. HESS, HARRY K. HEss.

